1.9 head on a 1.6 mech. block - page 1 - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• 1.9 head on a 1.6 mech. block by saurkraut on 02 Dec, 2006 07:22
• Just scored a new 1.9 IDI head.  I intend to put in on my 1.6 mech. block.
  
  Anyone have a good solution for the extra oil return/coolant passage issue?
  
  Also, as long as its brand new, I think I'll do the ceramic coating in the prechambers, head, and exhaust ports.  Any body had this done befor. and who did it?
  
  Its going to be a winter project while my '79 hibernates.
• #1 by RabbitJockey on 02 Dec, 2006 07:38
• just plug the extra hole and then it's basically a bolt on.  the aftermarket heads are designed to fit both mechanical and hydro engines, although it is a mechanical one, it has like a dummy extra oil drain with no hole in it.  just plug the oil drain then the head is basically bolt on just like a normal solid lifter head,
• #2 by RabbitJockey on 02 Dec, 2006 07:39
• also, how does the 1.5td run compared to the 1.6td
• #3 by saurkraut on 02 Dec, 2006 08:11
• The head is a NOS 1.9 head.
  
  The extra oil drain hole is open.  i also want to run the metal HG.  I supose i'll go with BSP threaded plugs unles someone has a better suggestion.
  
  just looking for someone that has done it successfully.
  
  The 1.5 is still in work, its my winter rabbit.  just a month or so behind schedule.  Still collecting the turbo plumbing.  Manifolds and turbo are on.;  Airbox, turbodrain and what IP to use are the remaing issues.
• #4 by Audi80 on 02 Dec, 2006 09:14
• For metal HG, you will have to block the second return hole from gasket also. I used 2mm rubber for it.
• #5 by RabbitJockey on 02 Dec, 2006 10:11
• run the 1.5 pump, unless you want an lda, but the 1.5 pump will give me revs than a 1.6 pump, should help give it more ass, they are supposedly a little better.
• #6 by saurkraut on 02 Dec, 2006 13:04
• Yup, going to use a 1.5 pump.  I'd like to put the LDA top on the 1.5 pump, but I haven't gotten around to putting the two pumps side by side and see if it possible to swap the tops.
  
  i emailed Giles but haven't heard back yet.  I guess he is really busy now.  If the tops aren't intercangeable, maybe some of the guts are intercangeable.
  
  Probably have to do a rebuild as every used pump I've put on other diesels has leaked eventually.
  
  I'm really interested to see the results.  I even saved a crank and rods from a 1.5 to put in my 1.6 if things work out.
• #7 by 935racer on 02 Dec, 2006 16:01
• Maybe I am missing something but you can't mount a hydro head on a mechanical block, what is going to give the lifters pressure?
• #8 by burn_your_money on 02 Dec, 2006 16:11
• Quote from: "935racer"

  Maybe I am missing something but you can't mount a hydro head on a mechanical block, what is going to give the lifters pressure?

  
  
  Yeah now that you mention it I seem to recall reading that you can use a mech head on a hydro block but not vise-versa
• #9 by 935racer on 02 Dec, 2006 17:20
• I know you can't, unless these reman heads come with mechanical cam followers, which I highly doubt they do, than its just like a factory head. Hydro heads only go on hydro blocks, Mechanical heads will fit on either.
• #10 by RabbitJockey on 02 Dec, 2006 19:55
• he doesn't have aftermarket... but the aftermarket one i have will go on either.  i've read here several times that you can put a hydro head on a mechanical block but blocking the drain hole
• #11 by 935racer on 02 Dec, 2006 20:06
• Quote from: Trev0rbr

  he doesn't have aftermarket... but the aftermarket one i have will go on either.  i've read here several times that you can put a hydro head on a mechanical block but blocking the drain hole

  
  
  How do the lifters get oil pressure and how does it drain back into the block?
• #12 by saurkraut on 02 Dec, 2006 20:19
• Its a NOS bare head, guides only. I was planning on running solid lifters. Will they fit in the Hydro head?
• #13 by RabbitJockey on 02 Dec, 2006 20:21
• just so you know i am not arguing in any way or anything, but the drain holes are the same right. theres 3 of them 2 in the back and 1 in the front, then a hydro head has an extra one in the front, thats the one you plug right.  and wouldn't they just get oil through the normal passages?
• #14 by saurkraut on 03 Dec, 2006 05:59
• A lot of stuff flying around here.
  
  Finish this statement:
  
  "It is IMPOSSIBLE to put a hydro head on a mechanical block because....."